AET Electrical Fundamentals 1 — Questions and Answers
Question 1: What is the unit of electrical resistance?
- Ampere
- Volt
- Ohm (Correct answer)
- Watt
Correct answer: Ohm
Resistance is measured in ohms (Ω), named after Georg Simon Ohm.
Question 2: According to Ohm's Law, if voltage is 24V and resistance is 6Ω, what is the current?
- 2A
- 4A (Correct answer)
- 6A
- 144A
Correct answer: 4A
Using Ohm's Law (I = V/R), 24V ÷ 6Ω = 4 amperes.
Question 3: Which type of circuit has all components connected end-to-end in a single path?
- Parallel circuit
- Series circuit (Correct answer)
- Bridge circuit
- Resonant circuit
Correct answer: Series circuit
In a series circuit, current follows one continuous path through all components.
Question 4: What happens to total resistance when resistors are connected in parallel?
- It increases
- It stays the same
- It decreases (Correct answer)
- It doubles
Correct answer: It decreases
Adding resistors in parallel provides additional current paths, which decreases total resistance.
Question 5: What is the power consumed by a circuit with 2A of current and 12V applied?
- 6W
- 10W
- 14W
- 24W (Correct answer)
Correct answer: 24W
Power (P) = Voltage × Current = 12V × 2A = 24 watts.
Question 6: In aircraft DC systems, which wire color typically indicates a ground return?
- Red
- Blue
- Black or bare (Correct answer)
- Green
Correct answer: Black or bare
In aircraft wiring, black or bare/uninsulated wires typically designate ground returns per MIL-W-5088 standards.
AET Electrical Fundamentals 1
What is the unit of electrical resistance?